White/gray screen reset not working

On vacation last July ipad went to white screen. It’s never been dropped or damaged. Hold on home button and power button did not work. Screen goes off then comes back on no apple logo just white/grayish. I tried restoring through iTunes and resetting however it says next time it’s connected to wifi it will complete process. I can’t connect to wifi bc I can’t see anything on the screen. I have not charged this iPad in several months. I thought if it completely died and then I charge it maybe that would do something. I pressed the power button today and the white/grayish screen came on! This ipad will not die lol I’m at a loss. I only used this ipad for about 7 months when this started happening and now it’s been over a year any suggestions?